Ambulance



FIG. 1 is a perspective view of an ambulance showing my new design;

FIG. 2 is a perspective view taken from the rear and opposite side thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for an ambulance, substantially as shown. 